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technical drawingschool of art, design and architecture
nust – spring 2011
http://www.youtube.com/watch?v=bnu2GB7w4Qs
http://www.youtube.com/watch?v=q6mk9HPxWvo
Objective abstraction- axonometric view
Intro to technical drawingisometric view
Axonometric means to
measure along axes.
Axonometric projection
shows an image of an
object as viewed from a
skew direction in order to
reveal more than one side in the same picture.
technical drawing introductionwhat is an axonometric drawing?
technical drawing introductionwhat is an axonometric drawing?
Parallel projection
Parallel projections have lines of
projection that are parallel both
in reality and in the projection
plane (drawing).
Intro to technical drawingisometric view
Parallel projection
orthographic obliqueIn Orthographic projection linesare orthogonal (making anangle of 90 degrees) to theprojection
Oblique projection is created bydrawing one side of the objectfacing the observer. This side isalways drawn as a true shape
technical drawing introductionwhat is an axonometric drawing?
Intro to technical drawingisometric view
Parallel projection
orthographic
axonometric
Axonometric projection is a type of
orthographic projection, used tocreate a pictorial drawing of anobject, where the object is rotatedalong one or more of its axes relative tothe plane of projection.
plane of projection
technical drawing introductionwhat is an axonometric drawing?
Intro to technical drawingisometric view
Parallel projection
orthographic oblique
axonometric
di-metricIso-metric tri-metric
technical drawing introductionwhat is an axonometric drawing?
Parallel projection
orthographic oblique
axonometric
Iso-metric
Plano-metric /
Plan oblique
isometricAt 30-30 angle
At 45-45 angleOr 30-60 angle
technical drawing introductionwhat is an axonometric drawing?
Intro to technical drawingisometric view
Intro to technical drawingisometric view
technical drawing introductionwhat is an isometric drawing?
An isometric drawing is an angled drawing in which the horizontal lines are drawn at a
30 degree angle and the vertical lines are left straight.
Intro to technical drawingisometric view
technical drawing introductionwhat is an isometric drawing?
It is a simple way of representing a three dimensional object, keeping the elements
to scale and showing the relationship between several sides of the same object, so
that the complexities of a shape can be clearly understood.
As a result, an isometric drawing is
simply a picture of an object
viewed at an angle.
technical drawing introductionwhat is an isometric drawing?
Intro to technical drawingisometric view
technical drawing introductionHow to draw an isometric drawing?
Drawing isometric
Isometric sketches begin
with defining an isometric
axis, one vertical and two
drawn at 30 degrees from
the horizontal.
Intro to technical drawingisometric view
technical drawing introductionComponents of an isometric drawing
30 30
vertical axis
horizontal axis
angular lines
Intro to technical drawingisometric view
technical drawing introductionHow to draw an isometric drawing?
In an isometric drawing, the object's
vertical lines are drawn vertically, and
the horizontal lines in the width and
depth planes are shown at 30 degrees
to the horizontal.
Intro to technical drawingisometric view
These three lines of the isometric
axis represent the three primary
dimensions of the object: width,
height, and depth.
y
xz
Intro to technical drawingisometric view
technical drawing introductionHow to draw an isometric drawing?
When drawn under these guidelines, the lines parallel to these three axes are at their
true (scale) lengths. Lines that are not parallel to these axes will not be of their true length.
Intro to technical drawingisometric view
technical drawing introductionHow to draw an isometric drawing?
Intro to technical drawingisometric view
technical drawing introductionHow to draw an isometric drawing?
For example…
technical drawing introduction
drawing plan in isometric
plan
Plan in isometric
elevation
Intro to technical drawingisometric view
The first step in drawing isometric is
to rotate the plan on 30-30
degrees on plane of projection
which distorts the plan.
technical drawing introductionHow to draw an isometric drawing?
height on scale
depth on scale
Intro to technical drawingisometric view
technical drawing introductionhow to draw an isometric drawing?
Isometric graph paper
can also be used for
making such drawings.
Intro to technical drawingisometric view
steps
1. Positioning object.
2. Select isometric axis.
3. Sketch enclosing box.
4. Add details.
5. Darken visible lines.
Sketch from an actual objecttechnical drawing introduction
Intro to technical drawingisometric view
Non-isometric line
A
A x
y
x
xB
B
AB
C
C
C
x
y
Object having inclined surfacetechnical drawing introduction
Intro to technical drawingisometric view
A
A
B
B
C D
E
D
EF
F
x
yFront View
Regular
C
reverse
Drawing isometrictechnical drawing introduction
Intro to technical drawingisometric view
Circle & Arc in Isometric
3. Construct a perpendicular
bisector from each tangent point.
4. Locate the four centers.
5. Draw the arcs with these centers
and tangent to isometric square.
Four-centre method is usually used when drawing an isometric ellipse.
2. Construct an isometric square.
1. Locate the centre of an ellipse.
technical drawing introduction
Intro to technical drawingisometric view
Irregular Curve in Isometric
1. Construct points along the
curve in multi view drawing.
2. Locate these points in the
isometric view.
3. Sketch the connecting lines.
Steps
technical drawing introduction
Intro to technical drawingisometric view
technical drawing introductionExample in joinery
Isometric views are very useful to explain construction details.
Intro to technical drawingisometric view
technical drawing introductionExample in joinery
Isometric views of different types
of brick bonds.
attention – assignment 7Create an isometric view
Create an isometric view of your home.
Intro to technical drawingisometric view
technical drawing introduction
quote of the day
If you cannot help worrying,
remember that worrying
cannot help you
Intro to technical drawingisometric view
technical drawing introductionpicture of the day
Intro to technical drawingsada, spring 2010
technical drawing introduction
building of the day
Intro to technical drawingsada, spring 2010
Egg building, Mumbai
Intro to technical drawingsada, spring 2010
technical drawing introduction
[can you draw? Part 7]
video of the day –
http://www.youtube.com/watch?v=anfLSnAL_Sw&feature=related
Intro to technical drawingsada, spring 2010
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